Nearly two-thirds of executives interviewed believe professional networking Web sites -- like LinkedIn -- will prove useful in the search for job candidates in the next three years. And one in three respondents cited social networking sites -- such as Facebook or MySpace -- as a recruiting resource they plan to tap. One in five executives surveyed said video resumes will be useful.

"Maintaining and developing professional contacts has always been a vital job search strategy, and networking Web sites are another vehicle for doing so," said Max Messmer, chairman and CEO of Robert Half International. "Networking sites can be used to identify new career opportunities, create online profiles that highlight one’s skills and experience, and build a roster of business contacts over time."

While embracing technology can be beneficial, Messmer cautioned job seekers not to depend exclusively on the digital world.

"Tried-and-true methods such as networking at industry events, submitting well-written resumes and cover letters, and diligently following up with hiring managers are still essential to landing the ideal job," Messmer said. "Combining personal and online networking offers the best of both worlds."

Robert Half offers the following tips to make the most out of online networking:

• Craft your profile carefully. Pay as much attention to the content of your online profile as you would the information in your resume, and ensure the content highlights your professional skills, not just your personal interests. Also double-check for typos and grammatical errors.
• Ask for recommendations. Most professional networks provide space for others to comment on your work or recommend you to others. Don’t be shy about asking colleagues to post on your site. These testimonials help hiring managers learn more about your experience and work ethic.
• Build your list of contacts. The more quality contacts you have, the better. Invite trusted friends and colleagues to join your network. If you see an interesting profile in one of their networks, ask them to introduce or refer you to that person.
• Don’t post anything you wouldn’t want an employer to see. Job seekers should exercise discretion when posting personal information online. Use privacy settings effectively and make sure that any public messages or images you post don’t detract from your professional image.
• Don’t stop networking once you have a job. Savvy job seekers continue cultivating their networks after they secure positions. Online networks aren’t just job search tools; they also help you stay up-to-date on industry trends, find mentors who can offer valuable career advice, and alert you to upcoming events and educational opportunities.